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MFalpha/amd64/arm/ia64

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Retire pmap_track_modified().  We no longer need it because we do not
 create managed mappings within the clean submap.  To prevent regressions,
 add assertions blocking the creation of managed mappings within the clean
 submap.
This commit is contained in:
Alan Cox 2006-05-29 06:12:01 +00:00
parent 56e26c3e7e
commit 63ad764514
2 changed files with 7 additions and 23 deletions
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9
sys/sparc64/include/pmap.h
View File

@ -107,15 +107,6 @@ extern vm_offset_t virtual_end;
extern vm_paddr_t msgbuf_phys;
static __inline int
pmap_track_modified(pmap_t pm, vm_offset_t va)
{
if (pm == kernel_pmap)
return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
else
return (1);
}
#ifdef PMAP_STATS
SYSCTL_DECL(_debug_pmap_stats);

21
sys/sparc64/sparc64/pmap.c
View File

@ -1116,7 +1116,7 @@ pmap_remove_tte(struct pmap *pm, struct pmap *pm2, struct tte *tp,
if ((data & TD_WIRED) != 0)
pm->pm_stats.wired_count--;
if ((data & TD_PV) != 0) {
if ((data & TD_W) != 0 && pmap_track_modified(pm, va))
if ((data & TD_W) != 0)
vm_page_dirty(m);
if ((data & TD_REF) != 0)
vm_page_flag_set(m, PG_REFERENCED);
@ -1183,8 +1183,7 @@ pmap_remove_all(vm_page_t m)
pm->pm_stats.wired_count--;
if ((tp->tte_data & TD_REF) != 0)
vm_page_flag_set(m, PG_REFERENCED);
if ((tp->tte_data & TD_W) != 0 &&
pmap_track_modified(pm, va))
if ((tp->tte_data & TD_W) != 0)
vm_page_dirty(m);
tp->tte_data &= ~TD_V;
tlb_page_demap(pm, va);
@ -1209,7 +1208,7 @@ pmap_protect_tte(struct pmap *pm, struct pmap *pm2, struct tte *tp,
m = PHYS_TO_VM_PAGE(TD_PA(data));
if ((data & TD_REF) != 0)
vm_page_flag_set(m, PG_REFERENCED);
if ((data & TD_W) != 0 && pmap_track_modified(pm, va))
if ((data & TD_W) != 0)
vm_page_dirty(m);
}
return (1);
@ -1325,8 +1324,7 @@ pmap_enter(pmap_t pm, vm_offset_t va, vm_page_t m, vm_prot_t prot,
if (wired) {
tp->tte_data |= TD_W;
}
} else if ((data & TD_W) != 0 &&
pmap_track_modified(pm, va)) {
} else if ((data & TD_W) != 0) {
vm_page_dirty(m);
}
@ -1769,9 +1767,7 @@ pmap_ts_referenced(vm_page_t m)
tpn = TAILQ_NEXT(tp, tte_link);
TAILQ_REMOVE(&m->md.tte_list, tp, tte_link);
TAILQ_INSERT_TAIL(&m->md.tte_list, tp, tte_link);
if ((tp->tte_data & TD_PV) == 0 ||
!pmap_track_modified(TTE_GET_PMAP(tp),
TTE_GET_VA(tp)))
if ((tp->tte_data & TD_PV) == 0)
continue;
data = atomic_clear_long(&tp->tte_data, TD_REF);
if ((data & TD_REF) != 0 && ++count > 4)
@ -1790,8 +1786,7 @@ pmap_is_modified(vm_page_t m)
if ((m->flags & (PG_FICTITIOUS | PG_UNMANAGED)) != 0)
return (FALSE);
TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) {
if ((tp->tte_data & TD_PV) == 0 ||
!pmap_track_modified(TTE_GET_PMAP(tp), TTE_GET_VA(tp)))
if ((tp->tte_data & TD_PV) == 0)
continue;
if ((tp->tte_data & TD_W) != 0)
return (TRUE);
@ -1863,9 +1858,7 @@ pmap_clear_write(vm_page_t m)
continue;
data = atomic_clear_long(&tp->tte_data, TD_SW | TD_W);
if ((data & TD_W) != 0) {
if (pmap_track_modified(TTE_GET_PMAP(tp),
TTE_GET_VA(tp)))
vm_page_dirty(m);
vm_page_dirty(m);
tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp));
}
}